Method and system for video recording

ABSTRACT

A method and system for video recording are provided, the method including: reading an audio data stream of a target video in real time, and converting a video picture of the target video into a video frame data; monitoring a play state of the target video, recording a start time node when the play state indicates that the live broadcast is paused, and recording an end time node when the play state indicates that the live broadcast is resumed; calculating an amount of a to-be-inserted data based on the start time node and the end time node, and inserting an audio null packet data with an amount equal to the calculated amount before the audio data stream when the live broadcast is resumed; and synthesizing the audio data stream into which the audio null packet data is inserted and the video frame data into a recorded video file.

CROSS-REFERENCE TO RELATED APPLICATIONS

The present application is a continuation of PCT Patent application No.PCT/CN2019/090322 filed on Jun. 6, 2019, entitled “METHOD AND SYSTEM FORVIDEO RECORDING”, which is incorporated herein by reference in itsentirety. The above PCT patent application claims priority to ChinesePatent Application No. 201910335713.6, entitled “METHOD AND SYSTEM FORVIDEO RECORDING,” filed on Apr. 24, 2019, which is incorporated hereinby reference in its entirety.

TECHNICAL FIELD

The present disclosure relates to Internet technologies, and inparticular, to a method and system for video recording.

BACKGROUND

With the continuous development of live video technologies, more andmore users tend to watch live videos in a live video platform. A livevideo is highly time-efficient, and users can also communicate with ananchor or other users in real time by posting a barrage when watchingthe live video.

Currently, in order to allow users who miss the live broadcast to watchthe live video again, an on-going playing device may provide a videorecording function. Specifically, for picture content of the live video,the picture content may be intercepted as a video frame in a manner ofscreenshot. An advantage of such processing is that some visual specialeffects added to the picture content can be reserved. For example,special effects such as answering questions and giving gifts can bereserved during the live broadcast. For audio content of the live video,an original audio stream of the live video may be read. Subsequently,the intercepted video frame and the read original audio stream areseparately encoded to be synthesized into a recorded video file.

However, in the video file recorded as described above, audio may be outof sync with pictures. A reason is that during the live broadcast, it isvery likely that the video picture is paused due to a network freeze orthe anchor's actively pausing the live broadcast. In this case, theon-going pause scene can be restored in the manner of screenshot.However, when the live broadcast is paused, the audio stream will beinterrupted, and consequently a video duration corresponding to theintercepted video frame cannot match a video duration corresponding tothe audio stream. For example, it is assumed that the live video lastsfor one hour with 10 minutes of it being in a pause state. Then theintercepted video frame can match the duration of one hour, but theobtained audio stream has only a duration of 50 minutes. In this way,when the video frame and the audio stream are synthesized into a videofile subsequently, the video picture cannot be in sync with the audio.

It can be seen from the above that method for video recording which iscapable of ensuring synchronization of audio and pictures is urgentlyneeded currently.

SUMMARY

The present disclosure is intended to provide a method and system forvideo recording, to ensure synchronization of audio and pictures in arecorded video file.

In order to achieve the above object, one aspect of the presentdisclosure provides a method for video recording, the method includes:reading an audio data stream of a target video in real time, andconverting a video picture of the target video into a video frame data;monitoring a play state of the target video, recording a start time nodeat which a live broadcast is paused when the play state of the targetvideo indicates that the live broadcast is paused, and recording an endtime node at which the live broadcast is resumed when the play state ofthe target video indicates that the live broadcast is resumed;calculating an amount of a data to be inserted based on the start timenode and the end time node, and inserting an audio null packet data withan amount equal to a calculated amount of the data to be inserted beforethe audio data stream when the live broadcast is resumed; andsynthesizing the audio data stream into which the audio null packet datais inserted and the video frame data into a recorded video file.

In order to achieve the above object, another aspect of the presentdisclosure provides a system for video recording, the system includes:an audio and video data collection unit, configured to read an audiodata stream of a target video in real time and convert a video pictureof the target video into a video frame data; a play state monitoringunit, configured to monitor a play state of the target video, record astart time node at which a live broadcast is paused when the play stateof the target video indicates that the live broadcast is paused, andrecord an end time node at which the live broadcast is resumed when theplay state of the target video indicates that the live broadcast isresumed; a null packet data insertion unit, configured to calculate anamount of a data to be inserted based on the start time node and the endtime node, and insert a audio null packet data with an amount equal to acalculated amount of the data to be inserted before the audio datastream when the live broadcast is resumed; and a recording synthesizingunit, configured to synthesize the audio data stream into which theaudio null packet data is inserted and the video frame data into arecorded video file.

It can be seen from the above that, according to the technical solutionsprovided in the present disclosure, the play state of the target videomay be monitored when the audio data stream of the target video is readin real time. The start time node may be recorded when the target videois paused, and the end time node may be recorded when the target videois resumed. In this way, the amount of the audio null packet data thatneeds to be inserted during the pause may be calculated based on thestart time node and the end time node. Corresponding audio null packetdata may be inserted before the audio data stream when the target videois resumed. In this way, the audio data stream into which the audio nullpacket data is inserted may match the video picture of the target video,and the audio data stream may play mute audio null packet data when thetarget video is paused, thereby ensuring the synchronization of audioand pictures in the recorded video.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to clarify the technical solutions in the embodiments of thepresent disclosure, the following briefly describes the accompanyingdrawings required for describing the embodiments. It is evident that theaccompanying drawings in the following description show merely someembodiments of the present disclosure, and those of ordinary skill inthe art may derive other drawings from these accompanying drawingswithout creative efforts.

FIG. 1 is a schematic diagram of a method for video recording accordingto an embodiment of the present disclosure;

FIG. 2 is a first schematic diagram of insertion of an audio null packetdata according to an embodiment of the present disclosure;

FIG. 3 is a second schematic diagram of insertion of an audio nullpacket data according to an embodiment of the present disclosure; and

FIG. 4 is a schematic diagram of a function module of a system for videorecording according to an embodiment of the present disclosure.

DETAILED DESCRIPTION

In order to clarify the objectives, technical solutions, and advantagesof the present disclosure, the following further describes theembodiments of the present disclosure in detail with reference to theaccompanying drawings.

The present disclosure provides a method for video recording, and themethod may be applied to a device supporting video recording. The devicemay be an electronic device such as a tablet computer, a smart phone, adesktop computer, a smart wearable device, a notebook computer, or thelike used by the user, or may be a service server of a live videoplatform or a VOD (Video on Demand) platform, and may further be a videorecording apparatus used with a display.

Referring to FIG. 1, the method for video recording may include aplurality of steps below.

In step S1, an audio data stream of a target video is read in real time,and a video picture of the target video is converted into a video framedata.

In this embodiment, the target video may include a live video, or mayinclude an on-demand video. An audio collection and a video picturecollection may be performed respectively via parallel threads in a videorecording device. Specifically, when a player in the video recordingdevice is initialized, or when the video recording device receives aninstruction for video recording, an audio collection and coding moduleand a video collection and coding module may be created. There may beone or more audio collection and coding modules, each audio collectionand coding module may correspond to one track in the target video, andusually, there is one video collection and coding module.

In this embodiment, the video recording device may assign an audioparameter of a player playing the target video to the audio collectionand coding module after the audio collection and coding module iscreated, so that the audio collection and coding module reads the audiodata stream of the target video in real time according to the assignedaudio parameter. The audio parameters may include parameters, forexample, such as an audio sampling rate, an audio channel number, anaudio sampling bit depth, and the like. In actual application, the audiodata stream of the target video may be PCM (Pulse Code Modulation) data,and the PCM data may be obtained via decoding original audio data of thetarget video. The video recording device may be directly used forplaying after receiving the PCM data. Generally, an amount of the PCMdata tends to be large. In order to save the capacity of the recordedvideo file, the audio collection and coding module may encode the PCMdata. Specifically, an audio encoder may also be created via the audiocollection and coding module after the audio collection and codingmodule is created. The audio encoder may be configured to encode theread audio data stream of the target video into an audio file of aspecified format. The specified format may be specified by a user beforethe video recording starts, or may be a default format of the videorecording device. In actual application, the specified format may be,for example, an mp3 format, or an AAC (Advanced Audio Coding) format,etc. After the audio encoder is created, a corresponding database may beenabled according to an encoding type of the audio encoder. For example,for the encoding type of mp3, a libmp3lame library may be enabled.

In this embodiment, the audio collection and coding module may read thePCM data of the target video, and the audio encoder may encode the readPCM data to generate the audio file of the specified format. In theprocess of the video recording, the read PCM data and the generatedaudio file may be stored in a temporary buffer file path. The temporarybuffer file path may be generated based on a system time at which theaudio collection and coding module is created. In this way, the systemtime at which the audio collection and coding module is created mayuniformly denote the temporary buffer file path for storing the PCM dataand the audio file.

In actual application, three management queues may be set after theaudio collection and coding module is created, and the three managementqueues may respectively correspond to recording start and stopoperations, PCM data storage, and audio encoding. In this way, differentmanagement queues may be correspondingly enabled in different recordingstages to ensure that the recording process is performed in sequence.

In an embodiment, since there may be not only one audio collection andcoding module, in order to effectively manage a plurality of audiocollection and coding modules in sync, the video recording device mayfurther create one audio collection and coding management module inadvance. Then, after one or more audio collection and coding modules arecreated, the created audio collection and coding module may be added tothe preset audio collection and coding management module. In this way,the audio collection and coding management module may enable one or moreaudio collection and coding modules that are currently managed when thevideo recording starts, and disable one or more audio collection andcoding modules and clear a temporary file generated during the videorecording after the video recording ends, thereby realizing batchmanagement of the audio collection and coding modules.

In this embodiment, a video collection parameter may be set for thevideo collection and coding module after the video collection and codingmodule is created. The video collection parameter may include aplurality of parameters such as a video frame file output path, a videoresolution, a video collection frame rate, a video frame pixel format, avideo frame encoding mode, and the like. In actual application, thevideo resolution may be a specified video resolution. If no videoresolution is specified, a screen resolution of the video recordingdevice may be directly used as a default video resolution. In addition,the video collection frame rate may be a frame rate range. For example,a typical device usually has a frame rate range of 10 to 30 frames, andthe range may also reach between 10 and 60 frames as technology hasadvanced. If the video collection frame rate input by the user is withinthe range, the target video may be recorded according to the videocollection frame rate input by the user. However, if the videocollection frame rate input by the user exceeds the range, an upperlimit value or a lower limit value of the range may be taken by defaultto ensure that the video recording process can be performed normally.The video frame pixel format may be a 32-bit BGRA format. Definitely, inactual application, other video frame pixel formats may be flexiblyselected according to requirements instead of being limited to the32-bit BGRA format. There may also be a variety of video frame encodingmodes. For example, the video frame encoding mode may be an H.264encoding format, or may be a VP8, VP9 encoding format, and may furtherbe an HEVC encoding format.

It should be noted that a number of required parameters may be changedaccording to an actual application scenario. For example, during thevideo recording, the video frame file output path, the video collectionframe rate, and the video frame encoding mode are usually necessary,while the video resolution is optional. If no video resolution isspecified, it may be considered that the video resolution matches thescreen resolution of the video recording device.

In this embodiment, the video picture of the target video may be redrawninto a binary stream via the video collection and coding moduleaccording to the video collection parameter, and then the binary streammay further be encoded into a video frame data. The video frame dataobtained in this way may retain various visual special effects such asanswering questions and giving gifts in the video picture, therebycompletely restoring the picture content of the target video. Besides,when the picture of the target video is paused, the paused picture mayalso be recorded, thereby restoring the real scene of the target videoto the full extent during the live broadcast.

In step S3, a play state of the target video is monitored, a start timenode at which a live broadcast is paused is recorded when the play stateof the target video indicates that the live broadcast is paused, and anend time node at which the live broadcast is resumed is recorded whenthe play state of the target video indicates that the live broadcast isresumed.

In this embodiment, in the process of reading the audio data stream ofthe target video in real time, the audio collection and coding modulemay normally receive the PCM data if the target video is playednormally. The audio collection and coding module cannot receive the PCMdata if the target video is paused, and then the audio collection andcoding module can continue to receive the PCM data after the targetvideo is resumed. In order to ensure that the read audio data stream canbe synchronized with the video frame data obtained via conversion by thevideo collection and coding module, the audio null packet data may beinserted into the audio data stream in allusion to the live broadcastpause process, so that the audio data stream into which the audio nullpacket data is inserted may be aligned with the video frame data on thetime axis.

Specifically, in the recording process of the target video, the playstate of the target video may be monitored. In general, the pause stateof the target video may include an active pause and a passive pause. Theactive pause may mean that the target video is actively paused by avideo player. At this time, the video player may invoke a pauseinterface of the player, thereby actively pausing the target video beingplayed. When the pause interface is invoked, the play state parameterindicating that the live broadcast is paused may be transmitted to theaudio collection and coding module. In this way, a pause interface mayserve as a specified interface for monitoring, and it may be determinedwhether the target video is paused via monitoring the play stateparameter that is transmitted by the specified interface of the playerplaying the target video. The passive pause may mean that a livebroadcast is paused because the player has no data for playing due tonetwork fluctuations or insufficient buffer data. In this case, a playsystem in which the player is issues a global broadcast notificationindicating that the live broadcast is paused. In this way, it may bedetermined whether the target video is paused via monitoring the globalbroadcast notification sent by the playback system.

In this way, once the target video is paused, the audio collection andcoding module may acquire the state of the pause by the above-mentionedmanner. By this time, the audio collection and coding module may recordthe start time node at which the live broadcast is paused. Subsequently,when the audio collection and coding module may receive the PCM dataagain, it indicates that the target video is resumed. At the moment, theaudio collection and coding module may record the end time node at whichthe live broadcast is resumed. In this way, a period consisting of theend time node and the start time node may be a period during which thetarget video is paused.

In step S5, an amount of a data to be inserted is calculated based onthe start time node and the end time node, and an audio null packet datawith an amount equal to a calculated amount of the data to be insertedis inserted before the audio data stream when the live broadcast isresumed.

In this embodiment, a pause duration may be calculated according to thestart time node and the end time node, and then the amount of the datato be inserted may be calculated according to the pause duration and apreset audio parameter. The preset audio parameter may be audioparameters such as an audio sampling rate, an audio sampling bit depth,an audio channel number, and the like that are assigned when the audiocollection and coding module is created. In an actual applicationexample, the amount of the data to be inserted may be calculatedaccording to the following formula:

D=S×T×B/8×W

Where, D represents the amount of the data to be inserted, S representsthe audio sampling rate, T represents the pause duration, B representsthe audio sampling bit depth, and W represents the audio channel number.

Referring to FIG. 2, in this embodiment, after the amount of the data tobe inserted is calculated, the audio null packet data with an amountequal to a calculated amount of the data to be inserted may be insertedbefore the read audio data stream when the live broadcast is resumed. Inthis way, as shown in FIG. 2, the shadow portion is an actual audio datastream, and the blank portion is the audio null packet data that isinserted when the target video is paused. The audio null packet data maybe parsed and played by the play device normally, except that it is muteaudio information when played, and the play duration is the same as thepause duration of the live broadcast, so that the audio data stream intowhich the audio null packet data is inserted may be aligned with thevideo frame data on the time axis.

In an embodiment, in order to enable the audio collection and codingmodule to correctly insert the audio null packet data into the readaudio data stream, a global variable for indicating whether to insertthe audio null packet data may be set in the system in advance. Theglobal variable may have two variable values. When the variable value isa first value, it may indicate that the audio null packet data needs tobe inserted currently. When the variable value is a second value, it mayindicate that the audio null packet data does not need to be insertedcurrently. In this way, the variable value of the global variable may beset to the first value when the play state of the target video indicatesthat the live broadcast is paused. Moreover, each time the audiocollection and coding module receives the audio data stream of thetarget video, an on-going variable value of the global variable may bedetected. In this way, the audio collection and coding module may detectthe on-going variable value of the global variable when the target videois resumed. Then, because the variable value of the global variable isset to the first value when the live broadcast is paused previously, itmay be determined that the audio null packet data needs to be insertedcurrently when the audio collection and coding module detects that theon-going variable value of the global variable is the first value.Therefore, the amount of the data to be inserted may be calculated basedon the start time node and the end time node, and the audio null packetdata with an amount equal to the calculated amount of the data to beinserted is inserted before the audio data stream when the livebroadcast is resumed. After the audio null packet data is inserted, theaudio collection and coding module may set the variable value of theglobal variable to the second value. In this way, the audio null packetdata does not need to be inserted when the audio data stream of thetarget video is read subsequently, and the variable value of the globalvariable is set to the first value again until a next live broadcast ispaused.

In step S7, the audio data stream into which the audio null packet datais inserted and the video frame data are synthesized into a recordedvideo file.

In this embodiment, after the audio data stream into which the audionull packet data is inserted and the converted video frame data areobtained, the video recording device may synthesize the audio datastream and the video frame data into a video file, thereby obtaining therecorded video file. Specifically, the video recording device may createa synthesizing management module in advance, and the synthesizingmanagement module may be configured to synthesize the recorded videofile.

In an application example, the synthesizing management module may readthe video frame data upon having been converted and generate anAVURLAsset object of the video frame data. Then the AVURLAsset objectmay be added to a video track of an AVMutableComposition object. Next,the synthesizing management module may generate an AVAssetExportSessionobject by taking the audio data stream into which the video null packetdata is inserted and the AVMutableComposition object as initializationparameters. Finally, an AVAssetExportSession export session may beinitiated asynchronously to synthesize and export the recorded videofile.

It should be noted that if audio data streams of multiple audio tracksare included in the audio recording process, the synthesizing managementmodule may merge these audio data streams to form an audio data streamwith a new audio track. Subsequently, the audio data stream with the newaudio track and the AVMutableComposition object may be taken as theinitialization parameters to generate the AVAssetExportSession object.

In an embodiment, the synthesizing management module may further managemechanisms in the recording process. These mechanisms may include atimeout mechanism, an end mechanism, and the like. The timeout mechanismmay mean that the audio collection and coding module or the videocollection and coding module exceeds a preset collection and codingduration. Specifically, an audio collection and coding and a videocollection and coding are usually performed successively because the twoprocesses are performed in parallel in different threads. For example,the audio collection and coding may be completed first due to a smalleramount of data that needs to be processed, while the video collectionand coding is completed later due to a larger amount of data that needsto be processed. In the process of the collection and coding, sometimesabnormalities may occur in the collection and coding due to someuncontrollable reasons, and these abnormalities increase the durationrequired for the collection and coding process. In this case, a timeoutduration may be set in the synthesizing management module, and after oneof the audio collection and coding module and the video collection andcoding module completes an audio encoding or a video encoding, anencoding duration of another module is counted. For example, theencoding duration of the video encoding module may be counted after theaudio encoding module completes the audio encoding. If the encodingduration reaches the timeout duration, it indicates that an abnormalitymay occur in the encoding process. At this time, the on-going videorecording process may be stopped, and an exception log may be generated.Subsequently, the audio and video collection and coding process may berestarted according to an instruction of the user. Such processing isintended to stop the time-consuming collection and coding process intime and avoid endless waiting.

In this embodiment, the end mechanism may include a normal end, anabnormal end, and cancellation. The normal end may mean that when thevideo recording ends, the preset duration threshold is not exceeded, andan available capacity of the device is also greater than or equal to apreset capacity threshold. The normal end may further mean that aninstruction for ending the recording input by the user is received, whenthe video recording duration does not exceed the preset durationthreshold and the available capacity of the device is also greater thanor equal to the preset capacity threshold. In this case, the recordedaudio and video data may be processed to be synthesized into a recordedvideo file when the video recording is finished.

The abnormal end may mean that the recording is forced to end when theduration of the video recording exceeds the above preset durationthreshold or the available capacity of the device is less than or equalto the above preset capacity threshold. At this time, the on-going videorecording process may be stopped, and the recorded audio data stream andvideo frame data are synthesized into the recorded video file.

The cancellation may mean that the user actively abandons this recordingprocess. Generally, if a video recording cancel instruction is receivedin the process of the video recording and the duration of the videorecording is less than a minimum recording duration, the on-going videorecording process may be stopped, and the recorded audio data stream andvideo frame data may be emptied. In this case, it may be considered thatthe instruction for recording the video is an erroneous operation of theuser, and if a cancel instruction of the user is received shortly afterthe instruction for video recording, the on-going video recordingprocess may be abandoned, and the collected data is not processed anddirectly emptied. However, if a video recording cancel instruction isreceived in the process of the video recording and the duration of thevideo recording is greater than or equal to the minimum recordingduration, the on-going video recording process may be stopped, but therecorded audio data stream and video frame data need to be synthesizedinto the recorded video file. The reason for such processing is that theduration of the recording has reached the minimum recording duration, itindicates that the user may just want to record a small portion of thecontent of the target video. Therefore, in this case, it is necessary tosynthesize the collected data into the recorded video file after thisrecording process is stopped.

In an application scenario, the target video may not be resumed afterthe target video is paused until the end of the video recording. In thiscase, the audio null packet data cannot be inserted in the above mannerbecause there is no occasion to resume playing. In view of this,referring to FIG. 3, in an embodiment, if the target video has been in apause state since the live broadcast is paused until the video recordingends, a time node at which the video recording ends may be recorded, andan amount of a data to be supplemented is calculated according to thetime node at which the video recording ends and the start time node atwhich the live broadcast is paused. At this time, the audio null packetdata with an amount equal to the amount of the data to be supplementedmay be supplemented after the audio data stream when the live broadcastis paused. In this way, the period after the live broadcast is pauseduntil the video recording ends may be filled with the audio null packetdata.

Referring to FIG. 4, the present disclosure further provides a systemfor video recording, the system includes:

an audio and video data collection unit, configured to read an audiodata stream of a target video in real time, and convert a video pictureof the target video into a video frame data;

a play state monitoring unit, configured to monitor a play state of thetarget video, record a start time node at which a live broadcast ispaused when the play state of the target video indicates that the livebroadcast is paused, and record an end time node at which the livebroadcast is resumed when the play state of the target video indicatesthat the live broadcast is resumed;

a null packet data insertion unit, configured to calculate an amount ofa data to be inserted based on the start time node and the end timenode, and insert an audio null packet data with an amount equal to acalculated amount of the data to be inserted before the audio datastream when the live broadcast is resumed; and

a recording synthesizing unit, configured to synthesize the audio datastream into which the audio null packet data is inserted and the videoframe data into a recorded video file.

In an embodiment, the system further includes:

a global variable setting unit, configured to set a variable value of aglobal variable for indicating whether to insert the audio null packetdata to a first value when the play state of the target video indicatesthat the live broadcast is paused, and detect an on-going variable valueof the global variable when the live broadcast is resumed;

where, correspondingly, the null packet data insertion unit isconfigured to calculate the amount of the data to be inserted based onthe start time node and the end time node when the on-going variablevalue of the global variable is the first value.

In an embodiment, the null packet data insertion unit is furtherconfigured to record a time node at which the video recording ends ifthe target video has been in a pause state since the live broadcast ispaused until the video recording ends, calculate an amount of a data tobe supplemented according to the time node at which the video recordingends and the start time node at which the live broadcast is paused, andsupplement the audio null packet data after the audio data stream whenthe live broadcast is paused, where the audio null packet data has anamount equal to the amount of the data to be supplemented.

It can be seen from the above that, according to the technical solutionsprovided in the present disclosure, the play state of the target videomay be monitored when the audio data stream of the target video is readin real time. The start time node may be recorded when the target videois paused, and the end time node may be recorded when the target videois resumed. In this way, the amount of the audio null packet data thatneeds to be inserted in the pause process may be calculated according tothe start time node and the end time node. Corresponding audio nullpacket data may be inserted before the audio data stream when the targetvideo is resumed. In this way, the audio data stream into which theaudio null packet data is inserted may match the video picture of thetarget video, and the audio data stream may play mute audio null packetdata when the target video is paused, thereby ensuring thesynchronization of audio and pictures in the recorded video.

Based on the above descriptions of the embodiments, those skilled in theart may clearly understand that each embodiment may be implemented bysoftware in addition to a necessary general hardware platform, orcertainly may be implemented by hardware. Based on such anunderstanding, the technical solutions essentially or the partcontributing to the existing technologies may be implemented in a formof a software product. The software product is stored in a storagemedium, such as a ROM/RAM, a hard disk, or an optical disc, and includesseveral instructions for instructing a computer device (which may be apersonal computer, a server, a network device, or the like) to performthe methods described in the embodiments or some parts of theembodiments.

The above-described are only preferably embodiments of the presentdisclosure, but are not used to impose a limitation to the presentdisclosure. Any amendment, equivalent substitution and improvement madewithin the spirit and principle of the present disclosure shall beincluded in the protection scope of the present disclosure.

1. A method for video recording, comprising: at a computer devicesupporting video recording: reading an audio data stream of a targetvideo in real time, and converting a video picture of the target videointo video frame data; monitoring a play state of the target video,recording a start time node at which a live broadcast is paused when theplay state of the target video indicates that the live broadcast ispaused, and recording an end time node at which the live broadcast isresumed when the play state of the target video indicates that the livebroadcast is resumed; calculating an amount of a data to be insertedbased on the start time node and the end time node, and inserting audionull packet data with an amount equal to the calculated amount of thedata to be inserted before the audio data stream when the live broadcastis resumed; and synthesizing the audio data stream into which the audionull packet data is inserted and the video frame data into a recordedvideo file.
 2. The method according to claim 1, wherein the step ofmonitoring a play state of the target video comprises: monitoring a playstate parameter transmitted by a specified interface of a player playingthe target video; or monitoring a global broadcast notification sent bya play system, to determine an on-going play state of the target videovia the play state parameter or the global broadcast notification. 3.The method according to claim 1, wherein before the step of calculatingan amount of a data to be inserted based on the start time node and theend time node, the method further comprises: setting a variable value ofa global variable to a first value when the play state of the targetvideo indicates that the live broadcast is paused, wherein the variablevalue of the global variable is configured to indicate whether to insertthe audio null packet data, and detecting an on-going variable value ofthe global variable when the live broadcast is resumed; andcorrespondingly, calculating the amount of the data to be inserted basedon the start time node and the end time node when the on-going variablevalue of the global variable is the first value, and inserting the audionull packet data with the amount equal to the calculated amount of thedata to be inserted before the audio data stream when the live broadcastis resumed.
 4. The method according to claim 3, wherein after the stepof inserting the audio null packet data with the amount equal to thecalculated amount of the data to be inserted, the method furthercomprises: setting the variable value of the global variable to a secondvalue, wherein the second value is configured to indicate that there isno need to insert the audio null packet data at present.
 5. The methodaccording to claim 1, wherein the step of calculating the amount of thedata to be inserted comprises: calculating a pause duration according tothe start time node and the end time node, and calculating the amount ofthe data to be inserted according to the pause duration and a presetaudio parameter; wherein the preset audio parameter comprises an audiosampling rate, an audio sampling bit depth, and an audio channel number.6. The method according to claim 1, further comprising: recording a timenode at which the video recording ends if the target video has been in apause state since the live broadcast is paused until the video recordingends, and calculating an amount of a data to be supplemented accordingto the time node at which the video recording ends and the start timenode at which the live broadcast is paused; and supplementing the audionull packet data after the audio data stream when the live broadcast ispaused, wherein the audio null packet data has an amount equal to theamount of the data to be supplemented.
 7. The method according to claim1, wherein the step of reading an audio data stream of a target video inreal time comprises: creating an audio collection and coding module, andassigning an audio parameter of a player playing the target video to theaudio collection and coding module, so that the audio collection andcoding module reads the audio data stream of the target video in realtime according to the assigned audio parameter.
 8. The method accordingto claim 7, wherein after the step of creating an audio collection andcoding module, the method further comprises: creating an audio encodervia the audio collection and coding module, wherein the audio encoder isconfigured to encode the read audio data stream of the target video intoan audio file of a specified format.
 9. The method according to claim 7,wherein after the step of creating an audio collection and codingmodule, the method further comprises: adding a created audio collectionand coding module to a preset audio collection and coding managementmodule, wherein the audio collection and coding management module isconfigured to enable one or more audio collection and coding modulescurrently managed when the video recording starts, and disable one ormore audio collection and coding modules and clear a temporary filegenerated in the process of the video recording after the videorecording ends.
 10. The method according to claim 7, wherein the step ofconverting the video picture of the target video into the video framedata comprises: creating a video collection and coding module, andsetting a video collection parameter for the video collection and codingmodule, wherein the video collection parameter at least comprises avideo frame file output path, a video collection frame rate, and a videoframe encoding mode; and redrawing the video picture of the target videointo a binary stream via the video collection and coding moduleaccording to the video collection parameter, and encoding the binarystream into the video frame data.
 11. The method according to claim 10,further comprising: creating a synthesizing management module, andsetting a timeout duration in the synthesizing management module; andafter one of the audio collection and coding module and the videocollection and coding module completes an audio encoding or a videoencoding, counting an encoding duration of another module, and if acounted encoding duration reaches the timeout duration, stopping anon-going video recording process, and generating an exception log. 12.The method according to claim 1, further comprising: stopping a videorecording process, and synthesizing the audio data stream having beenrecorded and the video frame data into the recorded video file if aduration of the video recording is greater than or equal to a presetduration threshold, or an available capacity of a device is less than orequal to a preset capacity threshold in the process of the videorecording.
 13. The method according to claim 1, further comprising:stopping a video recording process, and clearing the audio data streamhaving been recorded and the video frame data if a video recordingcancel instruction is received in the process of the video recording anda duration of the video recording is less than a minimum recordingduration; or stopping the video recording process, and synthesizing theaudio data stream having been recorded and video frame data into therecorded video file if the video recording cancel instruction isreceived in the process of the video recording and the duration of thevideo recording is greater than or equal to the minimum recordingduration.
 14. The method according to claim 12, further comprising:stopping the video recording process, and clearing the audio data streamhaving been recorded and the video frame data if a video recordingcancel instruction is received in the process of the video recording andthe duration of the video recording is less than a minimum recordingduration; or stopping the video recording process, and synthesizing theaudio data stream having been recorded and video frame data into therecorded video file if the video recording cancel instruction isreceived in the process of the video recording and the duration of thevideo recording is greater than or equal to the minimum recordingduration.
 15. An apparatus for video recording, comprising: at least oneprocessor; and memory communicatively coupled to the at least oneprocessor; wherein the memory stores instructions which, when executedby the at least one processor, cause the at least one processor to: readan audio data stream of a target video in real time, and convert a videopicture of the target video into video frame data; monitor a play stateof the target video, record a start time node at which a live broadcastis paused when the play state of the target video indicates that thelive broadcast is paused, and record an end time node at which the livebroadcast is resumed when the play state of the target video indicatesthat the live broadcast is resumed; calculate an amount of data to beinserted based on the start time node and the end time node, and insertaudio null packet data with an amount equal to the calculated amount ofthe data to be inserted before the audio data stream when the livebroadcast is resumed; and synthesize the audio data stream into whichthe audio null packet data is inserted and the video frame data into arecorded video file.
 16. The apparatus according to claim 15, whereinthe instructions further cause the at least one processor to: set avariable value of a global variable to a first value when the play stateof the target video indicates that the live broadcast is paused, whereinthe variable value of the global variable is configured to indicatewhether to insert the audio null packet data, and detect an on-goingvariable value of the global variable when the live broadcast isresumed; and calculate the amount of the data to be inserted based onthe start time node and the end time node when the on-going variablevalue of the global variable is the first value.
 17. The apparatusaccording to claim 15, wherein the instructions further cause the atleast one processor to: record a time node at which the video recordingends if the target video has been in a pause state since the livebroadcast is paused until the video recording ends and calculate anamount of a data to be supplemented according to the time node at whichthe video recording ends and the start time node at which the livebroadcast is paused; and supplement the audio null packet data after theaudio data stream when the live broadcast is paused, wherein the audionull packet data has an amount equal to the amount of the data to besupplemented.